Stabilization of emulsions by fine particles II. capillary and van der Waals forces between particles

Levine, S.; Bowen, Bruce D.; Partridge, Susan

doi:10.1016/0166-6622(89)80272-0

Cited by 92 publications

(65 citation statements)

References 17 publications

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“…Earlier, Levine et al 14 studied the thermodynamics of emulsions stabilized by fine powders with van der Waals interactions The normalized profiles to Fw ) 3.34 × 10 29 e -/m 3 of the electron density across the n-hexane/silica sol interface of the threelayer (solid) and four-layer (dash) models with the definition of the layers. For clarity, the circles depict a monolayer of silica particles, and the dots represent the specifically adsorbed ions of Na + (Stern layer).…”

Section: Discussionmentioning

confidence: 99%

Water Density in the Electric Double Layer at the Insulator/Electrolyte Solution Interface

Tikhonov

2006

J. Phys. Chem. B

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I studied the spatial structure of the thick transition region between n-hexane and a colloidal solution of 7-nm silica particles by X-ray reflectivity and grazing incidence small-angle scattering. The interfacial structure is discussed in terms of a semiquantitative interface model wherein the potential gradient at the n-hexane/sol interface reflects the difference in the potentials of "image forces" between the cationic Na + and anions (nanoparticles) and the specific adsorption of surface charge at the interface between the adsorbed layer and the solution, as well as at the interface between the adsorbed layer and n-hexane. The X-ray scattering data revealed that the average density of water in the field ∼10 9 -10 10 V/m of the electrical double layer at the hexane/silica sol interface is the same as, or only few percent higher (1-7%) than, its density under normal conditions.

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Section: Discussionmentioning

confidence: 99%

Water Density in the Electric Double Layer at the Insulator/Electrolyte Solution Interface

Tikhonov

2006

J. Phys. Chem. B

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“…The literature contains a number of studies on how particles affect the stability of froths and foams (relevant examples include Garrett 1979;Aronson 1986;Dippenaar 1982aDippenaar , 1982bTang et al 1989;Berg 1989a, 1989b;Hudales and Stein 1990;Koczo et al 1994;Aveyard et al 1994;Kulkarni et al 1.11 1977) and the similar situation of emulsions (Van Boekel and Walstra 1981;Hassander et al 1989;Levine et al 1989aLevine et al , 1989bSharma 1994, 1995). In these studies, particles both increased and decreased the stability of the bubbles, and the role of the particles depended on subtle differences in the bubble (droplet)/particle interactions.…”

Section: 10mentioning

confidence: 99%

An Approach to Understanding Cohesive Slurry Settling, Mobilization, and Hydrogen Gas Retention in Pulsed Jet Mixed Vessels

Gauglitz¹,

Wells²,

Fort³

et al. 2009

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“…The adsorption energies associated with displacing the particles from the surface can easily be of the order of tens of thousands of k B T, even for relatively small particles with a size of a few tens of nanometer. [16][17][18] Here T denotes the temperature of the system and k B the Boltzmann constant. At sufficient surface coverage of the bubbles, the particles form a 2-D network, either through direct contact (hard sphere) or else more specific bonds such as aggregation or even sintering.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle adsorption rates on the disproportionation process in pickering stabilised bubbles

Ettelaie

Murray

2014

The Journal of Chemical Physics

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The degree of shrinkage of particle stabilised bubbles of various sizes, in a polydisperse bubble dispersion, has been investigated in the light of the finite adsorption times for the particles and the disproportionation kinetics of the bubbles. For the case where the system contains an abundance of particles we find a threshold radius, above which bubbles are stabilised without any significant reduction in their size. Bubbles with an initial radius below this threshold on the other hand, undergo a large degree of shrinkage prior to stabilisation.As the ratio of the available particles to the bubbles is reduced, it is shown that the final bubble size, for the larger bubbles in the distribution, becomes increasingly governed by the number of particles, rather than their adsorption time per se. For systems with "adsorption controlled" shrinkage ratio, the final bubble distribution is found to be wider than the initial one, while for a "particle number controlled" case it is actually narrower. Starting from an unimodal bubble size distribution, we predict that at intermediate times, prior to the full stabilisation of all bubbles, the distribution breaks up into a bimodal one. However, the effect is transient and an unimodal final bubble size distribution is recovered once again, when all the bubbles are stabilised by the particles.-3-1

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Stabilization of emulsions by fine particles II. capillary and van der Waals forces between particles

Cited by 92 publications

References 17 publications

Water Density in the Electric Double Layer at the Insulator/Electrolyte Solution Interface

Water Density in the Electric Double Layer at the Insulator/Electrolyte Solution Interface

An Approach to Understanding Cohesive Slurry Settling, Mobilization, and Hydrogen Gas Retention in Pulsed Jet Mixed Vessels

Effect of particle adsorption rates on the disproportionation process in pickering stabilised bubbles

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